The small width of the flow channel in the plate heat exchanger makes it difficult for large-sized pollutants and debris in the slag flushing water to pass through, and in addition, high-density particles are prone to accumulate at the bottom of the heat exchanger, blocking the flow channel; Shell and tube heat exchangers generally have a horizontal, long, straight, and horizontal flow channel, and the impurities in the slag flushing water are prone to sedimentation and blockage. They require frequent cleaning and have poor heat exchange efficiency.
Plate heat exchangers or shell and tube heat exchangers have obvious design flaws in the waste heat recovery and heat exchange of slag washing water. Corrosion, blockage, and heat exchanger cleaning have become the most headache problems in the use of slag washing water waste heat recovery heat pump systems. Some slag flushing water source heat pump manufacturers have made some improvements on this basis, such as equipping the front section of the heat exchanger with a slag flushing water filtration device - "anti resistance machine", but still need to filter the slag flushing water for heat exchange.
Our company produces a waste heat recovery and heat exchange unit for blast furnace slag flushing water. The slag flushing water is not equipped with a sedimentation filtration device and directly enters the "slag flushing water heat exchanger" for heat exchange with heating water. It is to divert, rather than filter, so that the slag flushing water and debris can smoothly spiral down in the heat exchanger, while the intermediate water flows upstream. By utilizing the motion law of the fluid and adopting the wall type heat exchange principle, the problem of blockage in the application of slag flushing water is solved, and the heat exchange efficiency is improved.
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